The Red Line Denisoni Barb (Sahyadria denisonii), also known as the Roseline Shark, is a striking freshwater fish with a bright red stripe across its head and body and a black lateral line, making it a favorite for large, active community aquariums. These barbs are fast, peaceful schoolers that should be kept in groups of at least 6–8 to prevent stress and display natural behaviors. They require a spacious tank (55 gallons or more) with strong filtration, high oxygen levels, and some current to replicate their river habitat. Their diet should include a mix of high-quality flakes, pellets, frozen, and live foods to maintain health and color. They thrive in well-maintained aquariums with open swimming areas balanced by rocks, plants, and driftwood for cover. Consistent water parameters and regular maintenance are essential for their long-term care.
| Care Aspect | Details |
|---|---|
| Scientific Name | Sahyadria denisonii |
| Common Name | Red Line Denisoni Barb / Roseline Shark |
| Family | Cyprinidae |
| Origin | Southern India |
| Size | 4–6 inches (10–15 cm) |
| Lifespan | 5–8 years |
| Temperament | Peaceful, schooling |
| Minimum Tank Size | 55 gallons (210 liters) |
| School Size | 6–8+ individuals |
| Water Temperature | 72–79°F (22–26°C) |
| pH | 6.5–7.8 |
| Hardness | 5–15 dGH |
| Diet | Omnivore – flakes, pellets, frozen, live foods |
| Tank Setup | Spacious, strong flow, plants, driftwood, rocks |
| Compatibility | Peaceful community fish of similar size |